answer Q 12 plz answer this question my exam is coming soon
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Mean = sum of all observations/ number of observations
Mean monthly salary of 10 members = Rs 1445
So, total salary of 10 members = Rs 1445 x 10 = Rs 14450
Now, one more member whose monthly salary is Rs1500 has joined the group.
So, total salary of 11 members = Rs 14450 + Rs 1500 = Rs 15950
Thus, mean monthly salary of 11 members = Rs 15950/11 = Rs 1450
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